T. Austin-Sparks emphasizes the significance of the phrase 'once more' in Hebrews 12:27, illustrating how God removes the shakable, such as the Temple and priesthood, to reveal the unshakable, which is Christ. He reflects on the destruction of Jerusalem, where the once seemingly invincible structures crumbled, demonstrating that reliance on earthly systems and traditions is futile. Sparks argues that God desires a direct connection to the spiritual rather than the cumbersome religious machinery that obscures true divine engagement. Ultimately, what remains after the shaking is a pure, spiritual relationship with Christ, who serves as the High Priest and the essence of God's house. The sermon calls for believers to embrace a spontaneous, life-driven order rooted in the Divine.